MDE

Website: https://seveneves.ai/mde/

Lightweight markdown editor. Desktop app + browser version.

Download

Installers for Windows, macOS, and Linux: Releases

Features

• Dual mode — raw markdown with syntax highlighting, or WYSIWYG visual editing (Ctrl+E to toggle)
• Tabs — multiple documents, undo/scroll position preserved per tab
• Minimap — document overview sidebar
• Formatting toolbar — bold, italic, headings, links, lists, code blocks
• File associations — double-click .md files to open in MDE
• Single instance — new files open as tabs, not new windows
• Settings — word wrap, font size, persisted across sessions
• Drag and drop — drop .md files onto the window
• Diff view — side-by-side comparison of your unsaved buffer against the file on disk (Ctrl+Shift+D). When an agent or another editor rewrites a file you have unsaved edits in, the conflict bar offers "View diff" before you decide to reload or keep your version.
• Command palette — every action plus recent files, fuzzy-matched (Ctrl+K)
• YAML frontmatter — highlighted and foldable in raw mode
• Outline sidebar — headings with click-to-jump (Ctrl+Shift+O), plus foldable heading sections in raw mode
• Mermaid diagrams — ```mermaid fences render as diagrams in visual mode (rendered lazily; zero cost until a diagram appears)
• Auto-save — optional idle save-to-disk toggle (desktop)

Keyboard Shortcuts

Tech Stack

• Tauri 2 — Rust backend, ~13 MB binary
• React + TypeScript
• CodeMirror 6 — raw editor with markdown highlighting
• Milkdown (Crepe) — WYSIWYG editor
• Tailwind CSS

Build

npm install
npm run tauri build      # desktop installer
npm run build:web        # static site → dist-web/

Requires Node.js 20+ and Rust.

License

MIT